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Tumor Stage-Related Role of Radiotherapy in Patients with an External Auditory Canal and Middle Ear Carcinoma / Journal of the Korean Cancer Association, 대한암학회지
Cancer Research and Treatment ; : 178-184, 2017.
Article in English | WPRIM | ID: wpr-6983
ABSTRACT

PURPOSE:

The purpose of this study was to evaluate the clinical outcomes of patients treated with radiotherapy (RT) for a carcinoma of the external auditory canal (EAC) and middle ear. MATERIALS AND

METHODS:

The records of 32 patients who received RT from 1990 to 2013 were reviewed retrospectively. The Pittsburgh classification was used to stage all the cancers (early stage, T1/T2 [n=12]; advanced stage, T3/T4 or N positive [n=20]). Twenty-one patients (65.6%) were treated with postoperative RT and 11 patients (34.4%) were treated with definitive RT. The median radiation doses for postoperative and definitive RT were 60 Gy and 64.8 Gy, respectively. Chemotherapy was administered to seven patients (21.9%).

RESULTS:

The 5-year overall survival and disease-free survival rates for all patients were 57% and 52%, respectively. The disease control rates for the patients with early stage versus advanced stage carcinomawere 55.6% (5/9) and 50% (6/12) in the postoperative RT group and 66.7% (2/3) and 37.5% (3/8) in the definitive RT group, respectively. Overall, 15 cases (14 patients, 46.7%) experienced treatment failure; these failures were classified as local in four cases, regional in one case, and distant in 10 cases. The median follow-up period after RT was 51 months (range, 7 to 286 months).

CONCLUSION:

Patients with early stage carcinoma achieved better outcomes when definitive RT was used. Advanced stage carcinoma patients experienced better outcomes with postoperative RT. The high rate of distant failure after RT, with or without surgery, reflected the lack of a consensus regarding the best therapeutic approach for treating carcinoma of the EAC and middle ear.
Subject(s)

Full text: Available Index: WPRIM (Western Pacific) Main subject: Radiotherapy / Retrospective Studies / Follow-Up Studies / Classification / Treatment Failure / Disease-Free Survival / Consensus / Drug Therapy / Ear Canal / Ear, Middle Type of study: Practice guideline / Observational study / Prognostic study / Risk factors Limits: Humans Language: English Journal: Cancer Research and Treatment Year: 2017 Type: Article

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Full text: Available Index: WPRIM (Western Pacific) Main subject: Radiotherapy / Retrospective Studies / Follow-Up Studies / Classification / Treatment Failure / Disease-Free Survival / Consensus / Drug Therapy / Ear Canal / Ear, Middle Type of study: Practice guideline / Observational study / Prognostic study / Risk factors Limits: Humans Language: English Journal: Cancer Research and Treatment Year: 2017 Type: Article